Support

 ① Access control failure: The contact points of the access control switch are broken, or the S3 interface of the system IO board is faulty.
② Overheating of the phase-shifting transformer: The direction of the fan is incorrect, the temperature controller gives a false alarm, or there is too much dust in the environment.
③ Bypass cabinet action failure: The manual/automatic type setting is incorrect, or the address setting is wrong.
④ Buffer cabinet failure: The buffer contactor or the system IO board is faulty.
⑤ Frequency converter overload: The selected model is too small; the grid voltage is too low; the parameter setting is incorrect; the current detection circuit is faulty.

 When the equipment is not powered on and no 24V power supply is used, only by burning the software on a computer will the burning fail. However, using the 24V power supply and the corresponding software tool version (C2Prog_v2.2.0) will enable successful burning.

The control board uses the GD100-PV series control board to burn the non-standard software of GD170-PV. The overcurrent multiplier is insufficient.

A: The GD100-PV control board has an overcurrent multiplier of 2.5 times. It needs to be replaced with the GD170-PV series control board, which has an overcurrent multiplier of 2.83 times. The non-standard software needs to be optimized based on the foundation of the Egyptian long-line application.n.

The baud rate specified in the manual is 115200, but in practice, it works after changing the baud rate to 230400, allowing normal display and successful burning.

1. First, check if the bus voltage is normal and if the input and output fuses are functioning correctly.
2. Check for other accompanying alarms. Refer to the service manual to check the rectifier IGBT, bus fuse, and inverter IGBT.
3. Carefully inspect the fan outlet for corrosion, including the rectifier board J11 and inverter board J18 interfaces, and the location of the bus fuse.
4. Check if the signal cables connecting to the control board are properly connected.

Solution: 
1. Replace the rectifier board, bus board, and inverter board based on the inspection results and corrosion findings.
2. Replace the signal cables and control board.
(When replacing the control board, take precautions against static electricity and apply hot melt glue to the signal cable connections.)

1. First, check if the relay is functioning correctly.
① Check the relay terminals according to the service manual. Under power-off conditions, it should be in an open circuit state; otherwise, it may be stuck together.
② Power on the UPS. With the rectifier starting but the inverter not yet fully running, under normal circumstances, there should be inverter voltage but no output voltage or a very small value. Otherwise, a short circuit exists.
2. Check for other accompanying alarms. Check if the inverter IGBT and bypass SCR are functioning correctly.
3. Check if the signal cables between the output board and the control board are properly connected. Try unplugging and replugging them.
4. The voltage sampling or operational amplifier function on the control board may be faulty.

Solution: 
1. It is recommended to replace the output board first. 
2.If the alarm persists, it is recommended to replace the signal cables and the control board.
(When replacing the control board, take precautions against static electricity and apply hot melt glue to the signal cable connections.)

1. First, send the MTR 2.03.01C version to the customer. This version has an output calibration function.
2. Select the appropriate communication protocol and use RS232 or RS485 to connect the MTR to the UPS.
3. After the connection is successful, select "DetectAdjust-Mod Adjust" to calibrate the module; select "Cab Adjust" to calibrate the output of the cabinet.
4. When measuring the output voltage data, select the DC + AC mode to measure the DC component in the output. For the other measurement data, simply choose the corresponding mode.
5. Enter the actual measured data into the "Measure" column of the MTR software, and then 
click "Adjust" to complete the calibration.
Note:  When the calibration module outputs, it is necessary to measure and calibrate each individual module in sequence. Only after completing the separate measurements and calibrations of all modules can the modules be put into operation.

The logical steps for the check are as follows:

1.The SNMP card address cannot be found:
a. It might be that the SNMP card or the machine slot is damaged. You can verify this by repeatedly plugging and unplugging the SNMP card, replacing the machine slot, or updating with a new SNMP card.
b.Check if the network cable is in good condition
c.Check whether there are any issues with the rear connection of the SNMP card slot.
d.The fuse on the monitoring board is damaged. Use 232 to connect the MTR software to check if it works. If the connection is successful, it indicates that the fuse is in good condition. If it fails, it means the fuse is damaged.

2. If the SNMP card address can be found but communication still fails:
a.Check if there are any issues with the communication protocol, baud rate, etc. Try to make the computer network segment and the SNMP card network segment as consistent as possible.

 1. There are two triggering methods for UPS EPO, one is EPO button (local EPO) and the other is dry contact (remote EPO). You can first connect the UPS to the MTR software, enter the "Service Settings" to disable remote EPO, and observe if the device still experiences this phenomenon. If the device no longer experiences EPO triggering abnormalities, the dry contact board of the device needs to be replaced.

2. If the problem persists, it may be due to an abnormality in the circuit of the EPO button. Then disable the local EPO and observe the device's operation. This situation may be due to damage to the control board or monitoring board of the device.